Surgery A 45-year-old man presents with an upper gastrointestinal bleed. An upper endoscopy reveals multiple duodenal ulcers and an enlarged stomach. A Glucagonoma B Insulinoma C Zollinger-Ellison syndrome (ZES) D Watery diarrhea, hypokalemia, and achlorhydria (WDHA) syndrome 💡 Explanation A 45-year-old man presents with an upper gastrointestinal bleed. An upper endoscopy reveals multiple duodenal ulcers and an enlarged stomach. ✓ Correct Answer: C. Zollinger-Ellison syndrome (ZES)